Report - Summing issue

Experts, I have this report that is in development. (rptFacilAvail2)
What I need is a sum of Available Per Month.
You can see from the pic that I am not getting the correct balance based on the previous month.
I think you can see from the pic what the issue is instead of trying to explain by words.

Need some advice on how to do this trick. (You can also see that the month order is not correct)

In the previous article, Using a Critera Form to Filter Records (http://www.experts-exchange.com/A_6069.html), the form was basically a data container storing user input, which queries and other database objects could read. The form had to remain op…

I see at least one EE question a week that pertains to using temporary tables in MS Access. But surprisingly, I was unable to find a single article devoted solely to this topic.
I don’t intend to describe all of the uses of temporary tables in t…

In Microsoft Access, learn the trick to repeating sub-report headings at the top of each page.
The problem with sub-reports and headings:
Add a dummy group to the sub report using the expression =1:
Set the “Repeat Section” property of the dummy…

In Microsoft Access, learn how to use Dlookup and other domain aggregate functions and one method of specifying a string value within a string.
Specify the first argument, which is the expression to be returned:
Specify the second argument, which …